Logic Puzzle

Let me help solve this word problem step by step.

Let's break it down:

1. Sally is a girl
2. Sally has 3 brothers
3. Each brother has 2 sisters

The key insight here is that if each brother has 2 sisters, and we know Sally is one of those sisters, then all brothers must share the same sisters.

Since each brother has 2 sisters total, and we know Sally is one of them, there must be one other sister.

Therefore, Sally has 1 sister.

To verify:

• Sally + her 1 sister = 2 sisters total
• This matches the fact that each of the 3 brothers has 2 sisters

The answer is 1 sister.

This is an interesting logical reasoning problem! Let's work through it step by step.

We know:

• Sally is a girl
• Sally has 3 brothers
• Each brother has 2 sisters

The key insight is that Sally herself counts as a sister to her brothers. So when we're told that "each brother has 2 sisters," Sally is one of those sisters.

Since each brother has 2 sisters total, and Sally is one of them, that means each brother has 1 sister besides Sally.

But all brothers share the same sisters (they're all siblings in the same family). So if Sally has 3 brothers, and each brother has the same 2 sisters (Sally and someone else), then Sally has exactly 1 sister.

Therefore, Sally has 1 sister.

To solve this problem, I need to analyze the relationships carefully.

Given:

• Sally (a girl) has 3 brothers
• Each brother has 2 sisters

Since Sally is a girl, she counts as a sister to her brothers. So each of Sally's brothers has Sally as one of their sisters.

If each brother has 2 sisters total, and one of those sisters is Sally, then there must be exactly 1 other sister that all the brothers share.

Therefore, Sally has 1 sister.

Here's how to solve this classic riddle:

• Focus on the family: All the brothers and sisters are part of the same family.
• Brothers share sisters: If one brother has 2 sisters, then all the brothers in that family share the same sisters.

Since each brother has 2 sisters, and Sally is a sister in the family, those 2 sisters must include Sally and one other sister.

Therefore, Sally has 2 sisters.

Let's break down the problem:

• Sally is a girl.
• Sally has 3 brothers.
• Each brother has 2 sisters.

Let's analyze:

Sally's siblings:

• 3 brothers (let's call them B1, B2, B3)
• Sally herself

The brothers' sisters:

• Each brother has 2 sisters.

Who are the possible sisters for each brother?

• Sally is a sister to each brother.
• Are there any other sisters? That's the question!

If Sally is the only girl, then each brother would only have 1 sister (Sally). But the problem says each brother has 2 sisters.

Therefore, there must be another sister besides Sally.

Let's check: Suppose Sally has 1 sister (besides herself). So the siblings are:

• Sally (girl)
• A second sister (let's call her Anna)
• 3 brothers

Children in the family:

• 2 girls (Sally and Anna)
• 3 boys (the brothers)

Now, for each brother:

• Their sisters are Sally and Anna: 2 sisters (matches the problem statement).

So, Sally has 1 sister.

Final answer:

[ oxed{1} ]

Sally has 1 sister.

1. Participants and Their Relationships:

• Sally is a girl with 3 brothers, so there are 3 boys in the family.
• Each brother (being male) has 2 sisters.

2. Determine the Number of Girls:

• Every brother's sisters are the female siblings in the family.
• Since each brother has 2 sisters, there must be 2 girls in total.

3. Calculate Sally's Sisters:

• Since Sally is one of the 2 girls, her only sister is the other girl in the family.
• Therefore, Sally has 1 sister.

Answer: Sally has \boxed{1} sister.

Let's break this down step by step. Sally is a girl and has 3 brothers. The problem states that each of these brothers has 2 sisters.

Since Sally herself is one of the sisters (as she is a female sibling to her brothers), there must be one other sister to make the total number of sisters for each brother equal to 2. Therefore, the family consists of 2 girls (Sally and her sister) and 3 boys (Sally's brothers).

From Sally's perspective, the number of sisters she has is the number of other girls in the family besides herself. Since there is 1 other girl, Sally has 1 sister.

Answer: Sally has 1 sister.

Let's break down the problem:

• Sally is a girl.
• She has 3 brothers.
• Each brother has 2 sisters.

Let's name the siblings:

• Sally (girl)
• Brother 1
• Brother 2
• Brother 3

Now, the key: Each brother has 2 sisters.

Since Sally is one of the sisters, let's see if there are more:

Suppose there is only one girl (Sally) in the family.

• Then each brother would have only 1 sister: Sally.
• But the problem says they have 2 sisters each.

Thus, Sally must have one sister (since the brothers must have 2 sisters). Let's call this other sister "Anna".

So the siblings are:

• Sally (girl)
• Anna (girl)
• Brother 1
• Brother 2
• Brother 3

Now, each brother has 2 sisters: Sally and Anna.

So, how many sisters does Sally have?

• Sally's sisters = 1 (Anna).

Final Answer:

Sally has 1 sister.

Let's analyze the information:

• Sally has 3 brothers.
• Each brother has 2 sisters.

Since Sally is a girl and one of the sisters, for each brother to have 2 sisters, it means there must be a total of 2 sisters in the family (including Sally).

Therefore:

• Total number of sisters = 2
• Sally is one of them
• So, Sally has 1 sister

Answer: Sally has 1 sister.

Let
• S = number of sisters in the family (girls)
• B = number of brothers in the family (boys)

Given

1. Sally has 3 brothers ⇒ B = 3.
2. Each brother has 2 sisters ⇒ every boy sees exactly 2 girls in the sibling group.
   Therefore S = 2.

Since Sally herself is one of those 2 sisters, the number of sisters Sally has (other than herself) is

2 – 1 = 1.

Sally has 1 sister.